package com.sky.service.impl;



import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper  dishMapper;
    /**
     * 添加套餐
     */
    @Override
    @Transactional
    public void save(SetmealDTO setmealDTO) {
        // 创建一个套餐对象
        Setmeal setmeal = new Setmeal();
        // 将DTO中的属性复制到套餐对象中
        BeanUtils.copyProperties(setmealDTO, setmeal);
        // 将套餐对象插入到数据库中
        setmealMapper.insert(setmeal);
        // 获取套餐对象的ID
        Long id = setmeal.getId();
        // 获取套餐包含的菜品列表
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        //判断套餐的信息是否正确
            // 遍历菜品列表，设置每个菜品的套餐ID
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(id);
            });
            // 批量插入菜品到数据库中
            setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 根据id查询套餐和菜品
     * @param id
     * @return
     */
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal=setmealMapper.getById(id);
        List<SetmealDish> setmealDishes  =setmealDishMapper.getBySetmealid(id);
        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }
    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page =setmealMapper.pageQuery(setmealPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }
    /**
     * 批量删除
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        for (Long id : ids) {
            setmealMapper.delete(id);
            setmealDishMapper.deleteBySetmealid(id);
        }
    }
    /**
     * 更新套餐信息
     * @param setmealDTO
     */
    @Transactional
    public void updateWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //1、修改套餐表，执行update
        setmealMapper.update(setmeal);
        //套餐id
        Long setmealId = setmealDTO.getId();
        //2、删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
        setmealDishMapper.deleteBySetmealid(setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 启动和停止套餐
     * @param status 套餐状态
     * @param id 套餐ID
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        // 判断套餐状态为启用时，执行以下逻辑
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status == StatusConstant.ENABLE){
            // 查询套餐内所有菜品信息
            //select a.* from dish a left join setmeal_dish b on a.id = b.dish_id where b.setmeal_id = ?
            // 根据套餐ID查询套餐内的菜品列表
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                // 遍历菜品列表
                dishList.forEach(dish -> {
                    // 判断菜品状态是否为停售
                    if(StatusConstant.DISABLE == dish.getStatus()){
                        // 抛出套餐启用失败异常，并提示"套餐内包含未启售菜品，无法启售"
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        // 构造套餐对象，并设置套餐ID和状态
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        // 更新套餐状态
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
